The human body does not begin and end with the skin. The boundary between the body and the world is permeable. "You Are The Ocean", a large-scale interactive installation, generates ocean waves and clouds in response to the brain waves of a single participant. Water, light, clouds and lightening are realistically simulated by computer code. The participant wears an EEG (Electroencephalograph) head set that measures their approximate attention and meditation levels via brain waves. Through relaxation and concentration, the subject can control the water and sky. Attention level affects storminess: with higher concentration, waves get higher and clouds thicken. By calming her mind, the subject can create a serene ocean.